11도 7 버튼 탄화제철 톱니 버튼 비트 바위 뚫기

Video Description:
Discover the Yellow Carbon Steel Tapered Button Bit, a high-performance small hole blasting tool designed for rock drilling. Ideal for mining, tunneling, and construction, this 11-degree 7-button carbide steel bit ensures durability and efficiency. Perfect for rugged applications, it’s made from grade hard alloy and special steel for superior performance.